The decay chain of uranium-238 includes several radioactive isotopes.

The decade counter is used to count from 0 to 9 and then reset to 0.

I found a beautiful amethyst deceiver in the forest.

The Decade Volcano program aims to identify and study volcanoes that pose a significant threat to populated areas.

Appearances can be deceiving, and sometimes things that seem impressive or promising at first turn out to be disappointing or not as good as they initially appeared.

The December solstice marks the beginning of winter in the Northern Hemisphere.

Decade counters are used in digital electronics to count from 0 to 9 and then reset to 0.

The December solstices mark the longest and shortest days of the year.

The Decade Volcanoes are a group of sixteen volcanoes identified by the International Association of Volcanology and Chemistry of the Earth's Interior (IAVCEI) as being worthy of particular study in light of their history of large, destructive eruptions and proximity to populated areas.

The decay chains of radioactive elements can be complex.